Date   
Re: Voltage/Waveform chart?

ag4qc38313
 

Um, I also had a Wen gun back in the 50's.  But don't understand what this has to do with my original request.  Back on track, does anyone have a chart/spreadsheet/schematic with voltage/resistance and maybe waveforms from a working radio?  It sure would make things easier when you start to doubt yourself.

Re: BITX QSO Afternoon/Night, Sunday, March 18, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

Getting a lot of QRM from a broadcast station on 7275. Going to be on 7278.
--
John - WA2FZW

Re: BITX QSO Afternoon/Night, Sunday, March 18, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

I hear some on 7.277 but that nasty AM station is just about to wipe it out

--
David

 N8DAH
Kit-Projects.com

Re: BITX QSO Afternoon/Night, Sunday, March 18, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

going to try 7.287
--
David

 N8DAH
Kit-Projects.com

Re: RD16HHF1 power curve flattening...some

Nick VK4PP
 

THanks Glen.

I am making progress, got it working on 80,40,20, but still feedback on 15m, and 10m.
I put 220pf across all 7 emitor resistors. tried with and without, definitly a flatter output with. no effect on the feebback issue.
Changed back to the BN42-202, but a 2:4 ratio winding giving 1:4 transformation. Runs cool at 20+w with 330pf Mica cap. 1K feedback reistor.

80M - 22W
40M - 20W
20m - 18W

I did remove the SSM2167 Mic preamp and the feedback went away, but the mic output was very low... I then put in a MAX9814 mic chip/board via a BS170(same as the TX-POP setup) connected to the T/R line, To mute MIC on RX(DRAIN to GND on mic board..). Worked sortof. Got rid of the feed back, but when exiting TX I got a LOUD pop which causes the uC to reset?!?! so i removed the charge capacitor between GATE and SOURCE, Now the BS170 Switched off straight away, BUT the feedback is back ON TX.

I am thinking that the feedback is being caused by some sort of frequency interaction with the mic preamps and their power supply. Might be related to the TX-POP BS170 that is in the Audio path too...

Basically, the RD16 mods work. BUT when I intorduce any mods to the Mic amp side I start getting feedback. Adjusting RV1 reduced the feedback relative to power. SO I dont thiink I am overdriving the PA. I did try all number of combos of FB resistors and output transformer CAPS, and none made any difference in the feedback issue.
Also of not, is that if i Key CW, not feedback happens. I get full power, 22,20,18,16,14W... So if I can get the FB issue sorted Ill just stick to 20M and below on SSB and use the CW on the upper bands..

So Im thinking of using some inductors(filtering) in series with 5V to the Mic mute, as well as on the D7 pin thats triggering the BS170...

Any other suggestions?

73 Nick.

Source of small gauge shielded audio wire for a filter #ubitx

PeteWK8S
 

Looking for source of small gauge, shielded but flexible audio cable for internal wiring. 

Also looking for how folks might have added an audio filter like the Hi-Per-Mite filter internally to the uBitx.

I tried using a DPDT switch to route the audio from Audio1 connector to the filter and the DPDT switch then switching the filter out in and out to headphones.
It's a tight fit and cabling is crowed and awkward. It works but thinking there might be a better way.

If you've done let's hear and/or see how you did it.

Pete WK8S

Re: Sketch Upload Error

Tim Young
 

Solved it. For Board, selected Arduino Duemilanove in lieu of Arduiano Nano.


On 2018-03-18 15:55, Tim Young wrote:

I am receiving an error when trying to upload the KD8CEC sketch. Please take a look at the attached screen snip jpeg.

Suggestions?

Thanks,

Tim
WB7UVH


#ubitx-help #ubitx-help

R S
 

Opinions of help needed badly here.  About the 5th or 6th time I have turn it on, I was listening to Tom E3TH (I know the call is wrong.  All I could get) the entire 40 meter band has these sounds.  Even if volume all the way down.  I have attached an audio file.  Hope it works.  I did not try any other bands.  I can touch the finals and reduce the loudness dramatically, but still audible.  Can touch anywhere and reduce it.  Antenna and final PA are the most affecting.  The heat sink I put on the Raduino board is warm with only receiving.  I have also attached a few pictures internal.  I have a 1.5 swr on 7.277 MHz using my MFJ269C Pro.
Using a Turner +2 now amplified.  Nothing done from day one without antenna connected.

Thanks,
Ron  KJ4FFG

Re: BITX QSO Afternoon/Night, Sunday, March 18, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

Worked David N8DAH up on 7,287 with weak signals both ways and Don - VE3IDS in Ontario. He was on an HW-100 and very strong here.
--
John - WA2FZW

Re: #uBITX Firmware CEC Version Added WSPR function, I am looking for a beta tester. #ubitx

Ian Lee
 

Gerald

Thank you for your feedback.
I also confirmed the issue you mentioned.
This is the part I did not test and it is my mistake. This has been a great help to me.

I will reflect on the firmware to be released soon.

Ian KD8CEC

2018-03-19 6:42 GMT+09:00 ge_clipboard <clipboard@...>:

Hello Ian

While chasing a dx on 30m found another bug.
When RIT is enabled and then going into the Memory Keyer, one can‘t select a Memory except Nr. 0 as then the RIT-frequency is tuned.

73, Gerald - HB9CEY





--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

Teensy 3.5

Steve P
 

A thought occurred to me, it seems like a few other people have had this thought too, but Teensy would make a good drop in replacement for the nano.

I’m trying to get the 0.20 code ported over to the teensy for testing. I’ll be using the 4 line display code branch. The features I would like to implement include:

I2C display (done)
WSPR and JT modes using JT encode library
SD card implementation for storage of data, messages, frequency memory etc.

I’m having a few issues getting the code to run on Teensy though, I have a git hub at mosteveo/uBitx_Teensy if anyone wants to have a look.

Stephen

Re: Source of small gauge shielded audio wire for a filter #ubitx

Nick VK4PP
 

Hi, Chop up a set of cheap in-ear headphones....

See my new board, awating delivery:  https://groups.io/g/BITX20/topic/14920831?p=Created,,,20,1,0,0
Ill post up pic of it installed once done.
73 Nick.

Re: uBITx fabricated pcb chassis #ubitx

Richard E Neese
 

where to order this case looks great

Re: a Little Gun Shy #ubitx-help #ubitx

Vince Loschiavo
 

All Good today.  Once the KD8CEC software was installed, finally found a newer Memory Manager.
Maybe a Link in Files here for all pertinent programs, ie. uBITX Memory Manager all recent versions that Dr. Lee would like to have up, Hexfiles in sequence.
link to xloader, might give everyone that isn't a programmer a fighting chance to get upgraded to what appears to be great mods to the original software (by the way should also be there)
de
N2AIE
Vince
p.s. like the keyer ...

Re: Listening for BITX on Sunday 7277 kHz

Tom VE3THR
 

FB Vince. That's a great looking rig with the Pi interface. I might swap cases and do something similar  with my new uBITX instead. Could you drop me an email at mycall @ RAC.CA  I would be interested in your comments.
73 Tom VE3THR

Re: Soldering gun or iron

Michael Monteith
 

The white panel looks like nylon.  I use sheets of that to make guards and guide for table saws, routers, etc.  Very slick stuff.  Pretty soft to machine, drill, or cut.  But makes a super slick surface. 

73, Michael

KM4OLT

Re: Another uBitx Add-on PCB.

PeteWK8S
 

Thanks for the suggestion Nick,

BTW... I’ll buy one of those boards if you sell em. 
I’d considered tacking a relay onto a Hi-Per-Mite but yours would be more elegant. 

Let me know. 

Pete WK8S 

Re: Soldering gun or iron

Jerry Gaffke
 

Not necessarily grandpa's.

 I just now noticed the signature in the image, here's more of them:
    https://www.pinterest.com/pin/416090453046673659/

A very famous film star from the 1920's.
My dad always said Buster Keaton was his favorite.
"The General" was filmed in Cottage Grove, Oregon.

His Wen ad looks like it was made in the mid 1960's,
Still have the gun I got about then with my berry picking money. 
Hit the floor a few times, so covered in the friction tape
that now holds it together.  No idea what brand.

Jerry, KE7ER,   Flora OR



On Sat, Mar 17, 2018 at 06:17 pm, Ashhar Farhan wrote:
Anybody remember this from your grandpa's magazine stash ?
- f

Re: #ubitx-help #ubitx-help

Mike Woods
 

Nice build Ron!

I suspect you have noise from the display getting into your audio.  This may be an earth loop issue, or it may be leaking directly in to your speaker as it is shown in the photo located alongside the display. Those of us with BITx40s will recognise that sound!  It is not normally a problem on the uBITx.

Caps (0.1uF and perhaps a 45uF) each side of  the Raduino regulator may help ... it works on the BITx40 for many.  Others may have better ideas about potential solutions. At my place the noise from the antenna is more than enough to drown out this racket, so never was an issue until the antenna was unplugged.   If it was me I would pull those curled up unused wires on your audio and Raduino jacks as these can also generate hash.  Push on the little window on the reverse side of the jack with a flat-bladed screwdriver to release the pin.   They can easily be reinserted later if you store them in the junk box, when you need them to do something.

73 Mike ZL1AXG



On 19/03/18 12:16 PM, R S via Groups.Io wrote:
Opinions of help needed badly here.  About the 5th or 6th time I have turn it on, I was listening to Tom E3TH (I know the call is wrong.  All I could get) the entire 40 meter band has these sounds.  Even if volume all the way down.  I have attached an audio file.  Hope it works.  I did not try any other bands.  I can touch the finals and reduce the loudness dramatically, but still audible.  Can touch anywhere and reduce it.  Antenna and final PA are the most affecting.  The heat sink I put on the Raduino board is warm with only receiving.  I have also attached a few pictures internal.  I have a 1.5 swr on 7.277 MHz using my MFJ269C Pro.
Using a Turner +2 now amplified.  Nothing done from day one without antenna connected.

Thanks,
Ron  KJ4FFG


--
Mike Woods
mhwoods@...

Re: Raduino Replacemnt, COMING SOON!

Nick VK4PP
 

Hi Everyone.
I am happy with my RaduinoI2C board and the Audio Board. I havent build a HPF or LPF yet(other than prototype) but they are straight forward, still waiting on the CW filter...

Now Im trying to figure out the easiet way to get these boards out to people, ordering wise. Ebay wont allow me to list multiple of the same item, you need a $tore for that....
I will need to write up a little info page on eash board and assembly and all that with some pictures and prices. So just look there at what you like, and then send me an email with your order.
paypal only for payment.
Ill just keep a spreadsheet with orders...

Im trying to not over complicate the process and get too caught up in it. The boards work as expected, are great actually, and cant wait to get them out to you all to try...

I will go and check all my mails and get back to those that have already emailed me...

73

Nik.